Ronald Fisher, an English statistician (18901962), collected measurements for a sample of 150 irises. Of concern were

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Ronald Fisher, an English statistician (1890€“1962), collected measurements for a sample of 150 irises. Of concern were the following variables: species, petal width (PW), petal length, sepal width (SW), and sepal length (all in mm). (Sepals are the outermost leaves that encase the flower before it opens.) The goal of Fisher€™s experiment was to produce a simple function that could be used to classify flowers correctly. A sample of his data follows.
Ronald Fisher, an English statistician (1890€“1962), collected measurements for a

a. Is there a significant difference in the mean petal width for the three species? Use a 0.05 level of significance.
b. Is there a significant difference in the mean sepal width for the three species? Use a 0.05 level of significance.
c. How could Fisher use these outcomes to help him classify irises into the correct species?

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Elementary Statistics

ISBN: 9780538733502

11th Edition

Authors: Robert R. Johnson, Patricia J. Kuby

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